Formaldehyde gas sensitive material based on tin sludge recovery treatment, and preparation method thereof

A technology of formaldehyde gas and tin sludge, which is applied in the analysis of materials, material resistance, and material analysis through electromagnetic means, to achieve the effects of resource saving, production cost reduction, high sensitivity and response recovery rate

Active Publication Date: 2020-04-17
深圳爱多科传感技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, SnO prepared by hydrothermal method, sol-gel method, chemical precipitation method, etc. 2 Gas-based gas sensors have b

Method used

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  • Formaldehyde gas sensitive material based on tin sludge recovery treatment, and preparation method thereof
  • Formaldehyde gas sensitive material based on tin sludge recovery treatment, and preparation method thereof
  • Formaldehyde gas sensitive material based on tin sludge recovery treatment, and preparation method thereof

Examples

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Example Embodiment

[0037] Example 1

[0038] Dissolve 5g of the recovered tin sludge in 30ml deionized water, stir vigorously at 2000 rpm for 30 minutes, and then achieve solid-liquid separation by suction filtration. Place the obtained filter residue in a beaker and add 30 ml deionized water again, stir vigorously at 2000 rpm for 30 minutes, and then filter by suction To achieve solid-liquid separation, dissolve the obtained filter residue in 50ml deionized water, add 3.5ml0.5mol / L Ba(OH) to it under magnetic stirring 2 The prepared solution and 10ml of 0.5mol / L dilute sulfuric acid solution were magnetically stirred at room temperature for 1 hour, and the resulting solution was centrifuged to achieve solid-liquid separation. Then, the centrifuged product was washed with deionized water and absolute ethanol to neutrality, and then placed After holding for 12h at 60℃ in a drying box, grind the dried solid into a uniform powder and place it in a muffle furnace at 500℃ at a heating rate of 5℃ / min for ...

Example Embodiment

[0045] Example 2

[0046] Dissolve 5g of the recovered tin sludge in 30ml deionized water, stir vigorously at 2000 rpm for 30 minutes, and then achieve solid-liquid separation by suction filtration. Place the obtained filter residue in a beaker and add 30 ml deionized water again, stir vigorously at 2000 rpm for 30 minutes, and then filter by suction To achieve solid-liquid separation, dissolve the obtained filter residue in 50ml deionized water, and add 5ml0.5mol / L Ba(OH) to it under magnetic stirring 2 The prepared solution and 7.5ml of 0.5mol / L dilute sulfuric acid solution were magnetically stirred at room temperature for 1h, and the resulting solution was centrifuged to achieve solid-liquid separation. Then the centrifuged product was washed with deionized water and absolute ethanol to neutrality, and then Place it in a drying oven at 60°C for 12 hours, grind the dried solid into a uniform powder, and place it in a muffle furnace at 400°C for 2 hours at a heating rate of 5°C / ...

Example Embodiment

[0048] Example 3

[0049] Dissolve 5g of the recovered tin sludge in 30ml deionized water, stir vigorously at 2000 rpm for 30 minutes, and then achieve solid-liquid separation by suction filtration. Place the obtained filter residue in a beaker and add 30 ml deionized water again, stir vigorously at 2000 rpm for 30 minutes, and then filter by suction To achieve solid-liquid separation, dissolve the obtained filter residue in 50ml deionized water, add 4.5ml0.5mol / L Ba(OH) to it under magnetic stirring 2 The prepared solution and 20ml of 0.5mol / L dilute sulfuric acid solution were magnetically stirred at room temperature for 1 hour, and the resulting solution was centrifuged to achieve solid-liquid separation. Then, the centrifuged product was washed with deionized water and absolute ethanol to neutrality, and then placed After keeping it in a drying oven at 60℃ for 12h, grind the dried solid into a uniform powder and place it in a muffle furnace at 600℃ for 2h at a heating rate of ...

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Abstract

The invention discloses a preparation method of a Ba-doped and Fe modified formaldehyde gas-sensitive material based on tin sludge recovery treatment, and belongs to the field of tin secondary resource-tin mud recycling, resource saving, environmental friendliness and gas sensors. According to the invention, a by-product tin mud deposited at the bottom of an anode tank in electrotinning productionis subjected to BaSO4 doping through an aqueous solution route and is subjected to Fe2O3 modification through a high-energy ball milling method so as to prepare the formaldehyde gas-sensitive material; the prepared gas-sensitive sensing element has excellent gas-sensitive properties such as high sensitivity to formaldehyde, high response recovery rate and the like; and the product is creatively applied to the field of gas sensing while tin resources is saved, the production cost of enterprises is reduced and the consciousness of environmental protection is implemented, and a resource-friendlyand environment-friendly research method is provided.

Description

technical field [0001] The invention belongs to the fields of secondary tin resource—recycling of tin mud, resource conservation, environmental friendliness, and gas sensor, in particular a method for recycling tin mud and applying it to formaldehyde gas-sensitive materials. Background technique [0002] With the continuous development and expansion of the world's population and economic development level, the consumption rate of tin resources is huge and may be exhausted within a few decades. The production of tin mines alone cannot meet the global demand for tin. Therefore, it is of great significance to recover and reuse tin from tin secondary resources by simple and economical methods. Tin anode slime is an important secondary resource containing tin, which is a by-product in the production process of electroplating tin. Enterprises produce hundreds of tons of tin anode slime every year. Obviously, if the tin sludge is discharged as industrial waste, it will not only ca...

Claims

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Application Information

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IPC IPC(8): C01G19/02G01N27/12
CPCC01G19/02G01N27/125C01P2004/80Y02P10/20
Inventor 尹远洪梅小敏
Owner 深圳爱多科传感技术有限公司
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